From f80565a285c1cc321344d3da8280c09560091491 Mon Sep 17 00:00:00 2001
From: Eric Wald <gitter@brainshell.org>
Date: Sun, 10 Mar 2019 14:38:43 -0600
Subject: Support for simple_unit_tests under Python 2 (#72)

---
 pyparsing.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'pyparsing.py')

diff --git a/pyparsing.py b/pyparsing.py
index 4ba5b11..3befc7c 100644
--- a/pyparsing.py
+++ b/pyparsing.py
@@ -350,7 +350,11 @@ class ParseException(ParseBaseException):
             callers = inspect.getinnerframes(exc.__traceback__, context=depth)
             seen = set()
             for i, ff in enumerate(callers[-depth:]):
-                frm = ff.frame
+                if isinstance(ff, tuple):
+                    # Python 2 compatibility
+                    frm = ff[0]
+                else:
+                    frm = ff.frame
 
                 f_self = frm.f_locals.get('self', None)
                 if isinstance(f_self, ParserElement):
-- 
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